只做超声检查不能确定胎儿有唐氏综合征或其他染色体病变；
Ultrasonography alone does not determine if a pregnancy has Down syndrome or other chromosome disorders;
在颈部扫描有助于医生估计风险有唐氏综合征胎儿的缺陷或其他更准确地比母亲年龄孤单。
The nuchal scan helps doctors to estimate the risk of the fetus having Down syndrome or other defects more accurately than by maternal age alone.
一位特殊老师正带领孩子们做团体活动，这群孩子里有唐氏儿，过动儿，语言障碍的孩子及肌肉发育不佳的孩子。
A special teacher was leading a group of child, there are Down's child, ADHD child, speech delayed child and hypertonia child in this group.
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